Valve for pneumatic piano-players, &amp;c.



J. A. WESER.

VALVE FOE PNEUMATIC PIANO PLAYERS, (m.

APPLIGATION FILED D3012, 1911.

1.048.615. Patented De0.31,1912.

\WWM. WW

,the invention, however,

JOHN A. WESEB, or NEW YORK, m

VALVE FOB PNEUMATIC PIANO-PLAYERS, 8w.

Specification of Letters Patent. Patented Dec. 3111912.

Serial No. 665,363.

Application filed December 12, 1911.

of felt somewhat stiffer than the body, or of other suitable material,and contact pieces f" and f of thin leather, for contact with To allwhom it may concern Be it known that 1, JOHN A. Wnsnu, a citizen of theUnited States, residing in the borough of Manhattan of the city of Newthe valve cups or rings 1) and c. The con York, New York county, Stateof New .tact piece or cover f adjacent to the dia- York, have inventedcertain new and .usephragm, is preferably imperforate, as folImprovements in Valves for Pneumatic shown, while the contact piece orcover f on the opposlte end of the valve, is perforate, as at f, havingan aperture of relatively small diameter to cooperate with the guide pinhereinafter referred to. The body of the valve, including the caps, isrecesse as at f, the recess havinga diameter relatively. greater thanthat of the guide pin. The valve may therefore tiltwith respect to thestationary guide pin andlso adapt itself to the position of the valvering D or c as the case may be. The valve is guided in its movements bya stationary guide pin ,g which is suitably supported so as to enterPiano-llayers, &c., of which the following is a specification, referencebeing had to the accompanying drawing, which forms a part hereof.

The invention relates to valves such as are commonly used in pneumaticplaying devices for musical instruments and for other purposes, and hasfor itsvobjeet to improve the construction and operation of such valves,to reduce the cost of manufacture and to enable them to be placed inposition and adjusted readily.

The invention will be more fully eX- lained hereinafter with referenceto the accompanying drawing in which it is illustrated and in which thesingle figure is a detail view a valve the recess 1n the valve tselfthrough one side, In the construction shown'it enters freely through theaperture f in the cover f, which is nevertheless of such small diameterthat the valve is maintained substantially in axial position in itsmovein section illustratlng structure such as is commonly employed inthe pneumatics of pneumatic piano players, embodying the improved valve.

It will be obvious, as this description proceeds, that the improvedvalve may be employed in any valve structure in which it is possible to.use a valve of similar type. For convenience in explanation'of thenature of it is shown in the drawing as applied to an ordinary form 0valve structure, commonly employed in the pneumatics of pneumaticcontrolling devices of piano pl aycrs. This structure comprises, asshown, a valve casing (1, having in its top an aperture in which ismounte frictionally ring I) with a central portb' and in the other sidea valve cup or ring 3 with a central port 0, the port 7) usually openingto" atmosphere and the port 0 to the vacuum system of 'the player, aiaphragm chamber (Z with its diaphragm (1,- and a. button 0, providedwith an adjusting screw 6, by which the movement of the diaphragmcontrols the valve which is placed within the valve chamber a.

The valve f is suited in form tothe particular use for which it isdesigned. In the form shown it comprises a central body f, which may beof very light and .soft felt or other suitable material, top and bottomcaps f and f which are sufficiently large in diameter to cover the valveports and may be enough to-penetrate the valve completely in anyposition of the valve, the opposite end of the recess f being preferablyclosedby /the imperforate :cov-er f so that there is no leakage of airthrough thevalve itself. The recess 7" however, is sufliciently large toper mit the valve to tilt with respect to the any relative position ofthe valve seat. The guide pin is preferably formed of a bent wire. andsecured in the valve ring'b.

The wire-"g, which forms the guide pin, being-bent in .U shape, asshown, is readily secured; in place by driving theshort menibe; intothe-valve ring 6 and does not project above the-upper surface of thecasing nor require screws or'cross-bars or other devices to hold it inplace. the valve ring before the latter is placed in position it isitself placed in position with the valve ring and requires nofur-thermani'pulation. The upper valve ring 7),as will be observed, islarger in diameter than the valve f-so that the latter can be droppedinto place through the aperture in which the valve ring is subsequentlyplaced. Further- -more, through the placing of the button 0 on thediaphragm and the location of the relatively Being secured to ment. Thestationary guide pin is not long "guide pin and therefore to adaptitselfto adjusting screw 6 in the top of the button 7 the necessary adjustmentto regulate the lifting of the valvecan be effected before the valve andthe upper valve ring are put in place. 'And moreover, since the buttonis fixed with respect to the diaphragm, usually being glued thereto andthe point of contact between the button and the valve is in or above theplane of contact between the valve and the lower valve ring, the valveitself will be moved more easily and more certainly in to its desiredposition, since it bears directly with free rocking movement on the topof the button, than would be possible if the valve were provided with astcm'extending downward below the plane of contact between the lowervalve ring and the valve to the surface ot the diaphragm.

I claim as my invention:

1. In a valve structure of the character described the combination of avalve casing having opposite ports, a valve within the casing, said'alve comprising an imperforate bottom, a recessed body and a perforatetop, a stationary guide-pin entering the valve freely from above, adiaphragm to control the valve, abutton on the diaphragm, and anadjusting device supported by the button.

2. In a valve structure of. the character described, the combination ofa valve casing, a valve ring inserted in one side of the easing andforming a. valve seat, a valve therefor located in the casing, and aU-shaped wire having one member driven into the valve ring and havingits other member extended centrally into the valve casing to form astationary guide-pin for the valve. 4 This specification signed andwitnessed this 8th day of December A. 1)., 1911.

. JOHN A. VYESER.

Signed in the presence of \V. B. GREELEY, lVon'rnmc'rox CAMPBELL.

